SADshooter
Member
I've got a Bushmaster carbine upper on a Colt lower. Recently experienced several failures to extract during a range trip after not firing the rifle for a while. After clearing the second round fed into the rear of the fired case, cases would extract withmanual cycling.
I had problems after purchase with this upper because the gas port was out of spec, but that was corrected. I've got 3-500 rounds out of this upper.
I've thoroughly cleaned the chamber (I think) since, and on disassembling the bolt, the extractor rim appears OK, but the extractor spring looks a bit mashed (I can see two coils, and they don't seem symmetrical). Is there a visual or "feel" test for this spring? I'll probably replace it just on principle, but I'd like to tap the knowledge base here.
Thanks.
I had problems after purchase with this upper because the gas port was out of spec, but that was corrected. I've got 3-500 rounds out of this upper.
I've thoroughly cleaned the chamber (I think) since, and on disassembling the bolt, the extractor rim appears OK, but the extractor spring looks a bit mashed (I can see two coils, and they don't seem symmetrical). Is there a visual or "feel" test for this spring? I'll probably replace it just on principle, but I'd like to tap the knowledge base here.
Thanks.